Cylindrically square cartridge base insert



FIG. 1 is an isometric view of a cylindrically square cartridge base insert showing my new design.

FIG. 2 is a top view of a cylindrically square cartridge base insert showing my new design.

FIG. 3 is a cross sectional view of a cylindrically square cartridge base insert showing my new design.

FIG. 4 is a side view of a cylindrically square cartridge base insert showing my new design.

FIG. 5 is a side view of a cylindrically square cartridge base insert showing my new design.

FIG. 6 is a bottom view of a cylindrically square cartridge base insert showing my new design; and,

FIG. 7 is an isometric cross sectional view showing the cylindrically square cartridge base insert molded into a cartridge casing.

The nature and intended use of the article in which the design is embodied is a primer insert used in the manufacture of polymer ammunition casings. 

CLAIM The ornamental design for a cylindrically square cartridge base insert, as shown and described. 